Young in years but gargantuan in the gazongas, Thora Birch debuted on the TV show Day by Day as a tot in 1988. She quickly found fame on the big screen as the daughter in the Jack Ryan series, appearing in Patriot Games (1992) and Clear and Present Danger (1994). We watched her grow up, and, mam-oh-mam, did she grow. Still a teen as stardom called, Thora showed audiences how miraculously she had matured in the milkers during her lap-liquefying topless scene in American Beauty (1999). Thora's mom, Carol Connors, is an ex-porno star who played the naughty nurse in Deep Throat (1972). Named after the Norse god Thor, there is no doubt that this girl's got two mighty hammers--she's the golden goddess of thundering udders.